of this secondary radiation. In order to study the directionality of this effect, Cerenkov designed the experimental setup illustrated in Figure 2 using a conical mirror that reflected incoming radiation against a photographic plate located above a fluid-filled vessel. Photographs of the reflected light represent cases of ordinary luminescence
A sigil (/ËsÉªdÊÉl/; pl. sigilla or sigils; from Latin sigillum seal) is a symbol used in magic. The term has usually referred to a type of pictorial signature of a demon or other entity; in modern usage, especially in the context of chaos magic, it refers to a symbolic representation of the magician's desired outcome.
A vigil, from the Latin vigilia meaning wakefulness (Greek: pannychis, ÏÎ±Î½Î½ÏÏÎ¯Ï or agrypnia á¼Î³ÏÏÏÎ½Î¯Î±), is a period of purposeful sleeplessness, an occasion for devotional watching, or an observance. The Italian word vigilia has become generalized in this sense and means eve (as in on the eve of the war).